Edge-beveling machine



A.' F. JOHNSTON. EDGE -BEVELING. MACHINE.

APPLICATION FILED SEPT.27, I9I9.

1,368,263 Patented Fb. 15,1921.

2 SHEETS-SHEET I.

- f/V VAT/W271? a Y A. F. JOHNSTON. EDGE BEVEL'ING MACHINE. APPLICATION FILED $21 1.27, 1919f 1,368,263. Patented Feb. 15,1921.

2 SHEETS-SHEET 2.

' 'WWM,

. machines and particularly 'to'a machine for UNITED surest PA N OFFICE,

ALBERT F. JOHNSTON, or. TOLEDO, onro, 'ASSIGNOR or ONE-HALF 'ro EDMUND BROWN,

' I or rnnnrsnone, 01110.

- nnGE-BnvnLinG MAoHiNn 1 To all whom it may concern:

Be it known that I, ALBERT of Toledo, in the county of Lucas and State of Ohio, have invented a certain new and useful Edge-Beveling. Machine; and I do hereby declare the following to be a full, clear, and exact description or the invention,

such as will enable others skilledin the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the characters of ref,

bevelin the ed es of lass has of ,cir-

b ,C) cular, elliptlcal or, other curved form.-

The object of my invention is the pro vision of a simple and eflicient machine of. the character described, which is easy to operate and quickly adjustable toadapt it for grinding bevels on the edges'of plates of" different curved shapes and sizes. I

The invention is fully described in the following specification, and whiie, in its broader aspect,iit is capable of'emhodiment in numerous forms, a preferred embodiment thereof is illustrated in the 'accoinpanying' drawings, in which,

Figure 1 isa side elevation of a machine. embodying the invention, with parts broken away and with the work-carryingspmdle' n vertical position. Fig. 2is a front elevation of the machine, with portions broken away a and with the work-carrying spindle-in inclined position. 1 Fig. 3 is a fragmentary detail, with parts in section, of the automatic" axial adjusting means for the workecarrymg spindle. Fig. 4 is a se ctional view of the work holder at the end of the work-carrying spindle. Fig. 5 is an enlarged SGC tlOIl on the line 55 in Fig.1, withapart'in full,and Fig. 6 is a rearend elevation of the index means for determining the degree of in clination of the work-carrying spindle.

Referring to the: drawings, 'l designates the machine base having the upright 'portions 2 and 3 r1s1ngtherefrom,w1th the lat ter forming, in the present 'instance,.a coni cal socket-bearing 1' in its top in which the conical journal bearing 5 of a top frame 6 is mounted for horizontal turning movements. The frame 6 is prov ded \Yltlifhe two axialiy alined horizontal arms 7 and S, which" Specification. of Letters Patent. Patented Feb,

Application rfi led September 27, 1919. Serial No. 326,889.

I F. J orrNs'roN, a citizen of the United States, and a resident mg spindle 20, whilethe'bearing arm'19 prov ceive and form a bearing for the templet shaft 9, which carries a templet 10 'at'it-s forward end without the outer end of the journal 5 axially thereof and into the base upright 3 where its lower end is suitably are hollow throughout their length to re;

journaled and carries a pulley 14, for receiv- .ing power, as hereinafter described.

A tilting frame 15 is mounted above the. frame 6 long1tud1nally thereof for transverse tllting or rocking movements relativeof the respective frame arms 7 and 8. The forward end of the frame 15' is provided with bearing arms 18 and 19, the former of whichprojects downwardly and forwardly from the bearing 16 and forms a vertical pearingifor the lower end of the work-carryjects upward and forward from the bearing 16 01 from the forward end of the frame 15 and forms a vertical bearing for a hub sleeve 21, which has the upper end of the spindle 20 splined therethrough and is provided at rear end portion in a bearing arm 25 pro-' jecting upward from the frame 15. The

rear end of the shaft 2 1 is connected by a set of miter gears 26 to a vertical shaft 27,

which is ,journaled in a vertical bearing provided in theframe 15 and is provided at its lower end'witha miter gear 28in mesh -with' and driven by the gear 11011 the shaft 9. v V I It is apparent that rotation is communicated from the shaft 13 to the shaft 9 for turning the templet 10 and thence through ythe'sha'fts 27 and 24 to the work-carrying spindle 20. The speed of driving of the templet lOshouldbe the same as that of the spindle 20' and for this reason the different such purpose." 1

The spindle 20, which is intended to have free rotary and axial movements through its bearings, is provided at its lower end with a work-holding means 29, which, in the present instance, is in the form of a suction cup for holding a worlnplate a thereto. This suction cup is provided at its lower edge with a gasket 30 against which the workplate (0 seats, and when .a work-plate has been placed in position thereagainst, air is exhausted from the interior of the through an exhaust nipple 31, which may be connected to any suitable pumpfor such purpose, thus causing. a firm adhering of the work-plate to the holder, as well understood in the art..

The frame is tilted to present the edge of the work-plate a at such an angle to a subj acent grinding wheel or medium 32 asto form the desired bevel, and the frame is clamped and held in this position by a tightening of the split bearings '16 and 17 on the carrying arms of the frame 6. The upper end of the spindle 20 is extended above the sleeve 21 and is. provided with pressure of the spindle 20 is opposed in the major part of the templet 10, which bears upward against a flanged: collar 34 on the spindle 20 and acts on said collar to impart predetermined longitudinal movements to the spindle dependent on the shape of the templet. In the present embodiment of the invention, the collar 34 may either be loose or splined on the spindle 20 and has its upper end in ball bearing thrust contact with an adjusting collar 35, which is threaded on the spindle 20 and therefore adapted by a rotary movement thereof relative to the spindle to effect or permit an adjustment of the thrust collar 34 axially of the spindle. The adjusting collar 35 is automatically turned upward on the spindle at a slow pre- .determined speed to permit a downward feeding of the spindle and work at a speed suitable to compensate for the grinding away of the edge of the workeplate during the beveling action. It is therefore evident that the work-plate a does not bear on the grinding member 32 at the full weight or pressure of the spindle but at only a predetermined portion of such weight or pressure as the major portion thereof is borne by the templet 10, and that the turning of the adjusting collar on a threaded portion of the spindle permits a slight downward feeding of the spindle to compensate for the grinding action so that the pressure of the work-plate .on the grinding medium is approximately uniform during the entire beveling operation.

The automatic means employed'for adjusting or effecting a turning of the collar 35 on the spindle comprises a reciprocating cup ment of the lever relative to the post to var pawl or detent member 36, which is mounted in the frame 15 for longitudinal recip roeatory movements toward and away from the periphery of the collar 35 and has the end thereof adjacent to the collar adapted to work into a registering one of a plurality of notches 37 provided around the periphery of said collar, whereby to hold the collar against rotation with the spindle 20 when engaged by the detent and thus effect a predetermined upward turning of the collar on the spindle; A bell-crank lever 38 is carried by the frame 15 with its fulcrum stud 39 mounted in a horizontal slot 40 in said frame for horizontal adjustment. One arm of this lever extends downward and is yieldingly connected to. the rear end of the detent 36 to impart yielding reciprocatory movementsto said detent when the lever is rocked and the other arm of the lever. extends rearward, in the present instance, and is connected to a post 41, which is carried in vertical position by the frame 15 for yield ing vertical or longitudinal movements rela tive thereto, and has itsnpper end provided with aroller 42 bearing upward againsta cam 43 on the shaft 24. The post 41 extends down within a socket in the frame 15 and has a yielding upward pressure exerted thereagainst by a coiled compression spring 44 mounted in said socket. A pivot stud 45 projects from a side of the post 41 into a longitudinal slot 46 in the horizontal lever arm so as to impart rocking movements to the lever when the post 41 is vertically moved and to permit a horizontal adjustv the degree of rocking of the lever 38 as the distance of the stud 45 from the rocking axis of the lever may vary.

lVith this arrangement it is apparent that at each rotation of the shaft 24 the detent 36 is moved into engagement with a notch in the adjusting collar 35 and then retracted therefrom, the detent remaining in engagement with the collar a j sufficient period. to permit a predetermined turning of the spindle 20irelative thereto so that the collar is given a slight adjustment upward on the spindle to permit a corresponding lowering of the spindle toward the grind: ing member. It is also apparent that the extent of turning of the spindle in the collar 35 at each different operationor at each rotation of the shaft 24,.and consequently of the spindle 20, may be varied by adjusting the fulcrum of the lever 38 toward or away fromthe operating-stud 45 so as to vary the extent of movement of the lever at each operation andto consequently vary the period of engagement of the detent 36 with the collar. Should the adjustment be such that the permissible movement of the detent 36 toward and away from the collar 35 is less than the rocking movement of the lever rest during a the lever.

'erator clamps or fixedly attaches a work' the air from said'means to create a holding 38, the yielding connection between theclever and detent Will'permit' the detent to stand at f portion of the movement of The degree of tilting of'the frame 15' to I obtain the desired beveling of a work-plate on the spindle 20 is easily determined by the provisionof segmental degree plate t on the rear endof the bearing 17 and a stationary pointer or index finger 48 on the rear end of the'frame arm 8 in register with said plate. a i f The frame 6 which is mounted'for rotary adjustment in the base portion 3 is clamped in adjusting position, inthe present instance, by themanipulation of a cam lever 49, which is'carried by a shaft 50 j ournaled in the base 3, and has an eccentric or cam portion 51 in coaction with ashoulder'on the lower extended endof the frame beart ingr5. a I he grinding member 32,in the present instance, is of disk form and is carried at the upper end of' a vertical shaft 52 that is journaled in the upright 2 of'the base, and has a belt pulley 53 which may be belted to any suitable source of power. second pulley 5 1 on this shaft is connected by a belt 55 to the pulley '14 on the shaft 13 to effect driving of the latter shaft from'the shaft 52. In the operation of'my machine the opplate a to the holding means 29-of thelspindle 20, in the present instance by exhausting suction on the plate, and, if the tilting frame 15 has not already beenplacedat the proper inclination to impart the desired bevel to the edge of the work-plate when brought in contact with the driving or abrading member 32,-thebearings 16 and17 are loosened to permit of such adjustmentand then tightened to firmly clampfthe frame 15 in desired adjusted relation to the frame 6. The automatic-adj usting means forv the col- 1 lar 35 may also be adjusted, as hereinbefore described, to cause said'collar to have the desired extent of turning relative to the spindle 20 at each rotation of said spindle. The desired templet 10 having been placed on the shaft .9, the power is thrown on to. cause a driving of both the grinding'wheel' and the main shaft 13 of the work-holding and driving means from which rotation is communicated at like speed toboth the templet andspindle 2O.- If the templet is of other than true circular form the spindle and work will have the desired vertical movements imparted thereto to permit or cause the edge of the workpiece, which is of a shape corresponding to the templet, to Y remain in contact with the'grinding member as the work-pieceis rotatechit being understood that the templet acts upward 1 against the collar 34, which hasaball bearing thrust against the adjusting collar 35,

so that the major portion of the weight of the spindle, and parts carried therebyis I borne'by the templet rather than being (321- I erted 'onthework-plate a. As the grinding progresses and the edge of the work-plate is ground away the intermittent stopping of the rotation of the collar 35 during the rotation of the spindle 2O permits a gradual intermittent lowering of the spindle through the collars 35 and 34: suflicient' to compensate for the grinding away action. 1f it is desired to'bevel the edge of a circular workpiece, it is only necessaryto place a'circular templet ofdesired size on the shaft 9 and to adjust the frame 15 at the desired angle. The mounting of the frame 6' for horizontal rotarymovements on the base up- 1. In a machine of the class described, a tiltable frame, a non-tiltable frame, a work right3 permits a turning ofthe frame 6 carrying spindle carried for rotary and ax- 1 ial movements by the tiltable frame, a'rota T table templet carried by the non-tiltable.

frame and acting on a portion of the;spin

vdle to impart predetermined axial movements thereto whenthe templet is rotated,

andmeans forimpartingpredetermined ro-- I tation to the spindle and templet.

' 2; In a'machine of the class described, an

axially and rotatably movable workcarrying spindle, means carrying the spindle for tilting movements, a rotatable templet co-' axial with the'tilting axis of'the spindle and acting on a part of the spindle to controlthe axial movementsthereof, and means for imparting rotation to the spindle and Y templet. I

3. In a machine of the class described, a

frame mounted for tilted adjustment, a work carrying spindle journaled in the frame for axialand rotary movements andadapted to present theedge of a work-piece carried thereby to a grinding member for beveling the tilting axis of the spindle and acting on purposes, a rotatable templet coaxial with v the spindle to control its axial movements,

and means for imparting predetermined rotation to the spindle and templet.

4. In a machlne of' the. class described, a i i I frame, a work-carrying spindle journaled therein in substantially upright position and caused to exert a downward pressure toward its lower work-carrying end, a rotamined rotation to the spindle and to the templet.

6. In a machine of the class:described,a grinding medium, a frame mounted for vertical tilting movements, a Work-carrying spindle mounted in said frame for rotary and axial movements and adapted to be placed at a predetermined inclination to the workin face of the rindin medium b i an adjustment of said frame,.a rotatable templet acting on the spindle to control its axial movements and having a different axis of rotation from that of the spindle, means separate from the frame supporting the templet', and means foriinparting rotation to both the spindle and templet. i

7. In a machine of the class-described, a work-shaping member, a work-carrying spindle disposed at an incline to the work ing face of said member and mounted for rotary and axial movements, a thrust member carried by the spindle and adjustable axially thereof, a rotatable templet coacting with the thrust member to control the axial movements of the spindle, means operable to adjust the thrust member on the spindle,

and means for imparting rotation to the spindle and templet.

8. Ina machine of the class described, 'a worlcshaping member, a work-carrying spindle adapted to move by gravity toward said member, means guiding the spindle for axial and rotary movements, means for driving'the spindle, and means operable to control the axial movements of the spindle. 9. In a machine of the olassdescribed, a work-shaping member, a work-carrying spindle movable by gravity toward said member, means guiding the spindle for rotary'aiid axial movements,a thrust member carried by the spindle for adjustment axially thereof, a movable templet coacting with the thrust member to control the axial movements of the spindle, means for moving the templet and impartin rotation to the spindle, and means automatically oper able during a rotation of the spindle to impart predetermined relative adjustment to the spindle and thrust member.

10. In a machine of the class described. a work-carrying spindle movable axially by gravity toward a shaping means, means guiding the spindle for ax al and rotaryv movements, a thrust member carrled foraxial adjustment by the spindle, means coacting with the thrust member to support the spindle, means for imparting rotation.

to the spindle, and means operable to rela- V tively adjust the thrust member and spindle to permit a predetermined axial gravity movement of the spindle.

11. In a machine of the class described, a work-carrying spindle movable axially by gravity toward a shaping means, means guiding the spindle for axial and rotary movements, a thrust member carried for.

axial adjustment by the spindle,"means co-- acting with the thrust member to support the spindle,'means for imparting rotation i to the spindle, means operable to relatively 1 ad ust the thrust member and spindle to permit a predetermined axial gravity movement of the spindle, and means automaticallyoperable during a rotation of the spindle. to:

relatively. adjust the spindle and thrust member to permit a predetermlned axial gravity movement of the, spindle.

12. In a machine of the class-described, a

work-shaping member, a worlr-carrying' spindle axially movable by gravitytoward said member, means guiding the. spindle for rotary and axial movements, means for imparting rotation to the spindle, means supporting the spindle and having a member threaded thereon, and means operable to impart relative rotation to said spindle and thepthreaded member of the supporting,

means to permit a predetermined axial lowering of the spmdler 13. In a machine of the class described, a;

work-shaping member, a a work-carrying spindle axially movable by gravity toward said member, means guiding the spindle for rotary and axial movements, means for -in1-- parting rotation to the spindle, means for supporting the spindle and having a member threaded on the spindle and adapted to rotate therewith, and means automatically operable during a rotation of the spindle to V rotary and axial movements, means for; im-

parting rotation to the 5 indie, a thrust member threaded on the spindle, means having a part coacting with the thrust member to support the spindle, and means connected to the spindle driving means and operable to periodically engage the thrust member and hold it against movementwith the spindle to effect a relative axial adjustment of the spindle therethrough.--

15. In a machine of the class described, a work-shaping member, a frame, a shaft journaled in said frame, a templet carried by said shaft, tiltable frame carried by naled therein, a templet carried by said shaft, a frame tiltably carried by said first frame, a work-carrying spindle mounted for axial and rotary movements in the tiltable frame and having its inclination varied by an adjustment of the tiltable frame, means on the spindle coacting with the templet to control the axial movements of the spindle, and meansoperable to adjust the templet coacting means axially of the spindle, and means operable to impart rotation to the templet shaft and spindle.

17 In a machine of the class described, a frame mounted for horizontal adjustment, a shaft journaled therein, a templet carried by said shaft, a work-carrying spindle mounted in said frame for rotary and axial gravity movements relative thereto, said spindle having a part coacting with the templet to control the vertical movements of the spindle, and means for imparting rotation to the templet shaftand spindle.

18. In a machine of the class described, a work-shaping member, a horizontally adjustable frame, a frame carried fortilting adjustment by said first frame, spindle mounted in the tilting frame for rotary movements and for gravity axial movements toward the shaping member,-the inclination of the spindle being varied by a tilting adjustment of the tilting frame, a j, rotatable templet carried'by said first frame in coaction with a part of the spindle to control the axial movements of the spindle,

and means for imparting rotation to the templet and spindle.

19. In a machine of the class described, a work shaping member, a work-carrying spindle, means carrying the spindlefor r0- taryand axial movements, the axial movements being toward and away from said member, means urging an axial movement of thespindle toward the member, means for imparting rotation to the spindle, and tem let means coacting with the spindle to control the axial movements thereof.

20. In a machine of the class described, a

work-shaping member, 'a work-carrying spindle, means carrying said spindle for ro-' tary movements, for axial movements towvard and away from said member and for transverse movements relative tosaid'member, means urging an axial movement of the spindle toward said member, means for 1m.-

parting rotation to the spindle, and templet means coacting with the spindle to receive the normal axial spindle pressure and ad'- justable to permit a movement of the spindle toward the work-shaping member to compensate for, wear.

21. In a machine of the class described, a I

work-shaping member, a work-carrying spindle, means carrying the spindle for axial movements toward and away from said member for rotary movements and for tilting movements, means carried by the spindle for adjustment axially thereof, 7

means urging an axial movement of the spindle toward the work-shaping member, a rotatable templet coacting with the means carried by the spindle for resistinga move ment of the spindle by said urging means,

means for imparting rotation to the spindle and simultaneously therewith rotation to of the spindle, andmeans automatically op erable to adjust the templet coacting means axially of the shaftto'permit an axial movementof the shaft independent of that which is permitted by the templet to compensate for wear. 1

the templet to control the axial movements In testimony whereof, I have hereunto signed my nameto this specification.-

ALBERT, JOHNSTON. 

